rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=4094/1/0x4000000000000000 softirq=45271/45273 fqs=11
rcu: 	(detected by 1, t=10505 jiffies, g=36517, q=175 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11279 Comm: syz.9.2086 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:lock_is_held_type+0x123/0x190
Code: e8 92 16 00 00 b8 ff ff ff ff 65 0f c1 05 35 b4 26 07 83 f8 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 <75> 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 f9 73 26 07 48 3b
RSP: 0018:ffffc90000007518 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 2bc137f600ea4f00
RDX: ffff888022ba5640 RSI: ffffffff8dba9863 RDI: ffffffff8be33e80
RBP: 00000000ffffffff R08: ffffc900000075ef R09: 0000000000000000
R10: ffffc900000075e0 R11: fffff52000000ebe R12: 0000000000000046
R13: ffff888022ba5640 R14: ffffffff8e13a120 R15: 0000000000000000
FS:  00007f45b2f356c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e01bff8 CR3: 000000003c47e000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 trace_call_bpf+0x1f4/0x850
 perf_trace_run_bpf_submit+0x78/0x170
 perf_trace_lock_acquire+0x335/0x410
 lock_acquire+0x311/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:netlink_sendmsg+0x1f3/0xb30
Code: 81 f8 4d 8b 3e 49 83 c7 08 4c 89 f8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 0f b6 04 20 84 c0 0f 85 4e 07 00 00 45 8b 3f <e8> f8 84 d8 01 42 80 3c 23 00 74 08 4c 89 f7 e8 89 68 81 f8 4d 8b
RSP: 0018:ffffc9000461f8c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff11004574bde RCX: ffff888022ba5640
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000461f960
RBP: ffffc9000461f9d0 R08: ffffc9000461f95f R09: 0000000000000000
R10: ffffc9000461f940 R11: fffff520008c3f2c R12: dffffc0000000000
R13: ffff88801b370780 R14: ffff888022ba5ef0 R15: 0000000000000000
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f45b218eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f45b2f35038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f45b23d6090 RCX: 00007f45b218eba9
RDX: 0000000000004000 RSI: 00002000000000c0 RDI: 0000000000000009
RBP: 00007f45b2211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f45b23d6128 R14: 00007f45b23d6090 R15: 00007ffd15ba29e8
 </TASK>
rcu: rcu_preempt kthread starved for 10435 jiffies! g36517 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 11277 Comm: syz.1.2087 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:smp_call_function_many_cond+0xd33/0x12d0
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 b6 63 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 5f 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 45 5f
RSP: 0018:ffffc90004c5f940 EFLAGS: 00000293
RAX: ffffffff81b4621b RBX: 1ffff11009608341 RCX: ffff8881094d8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004c5fac0 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: ffff88804b041a08
R13: dffffc0000000000 R14: ffff88813663b1c0 R15: 0000000000000000
FS:  000055555dc93500(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ee0fff8 CR3: 0000000123882000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f9/0x1130
 arch_jump_label_transform_apply+0x1c/0x30
 __static_key_slow_dec_cpuslocked+0xbe/0x140
 static_key_slow_dec+0x45/0x90
 bpf_netns_link_release+0xb5/0x640
 bpf_link_free+0xed/0x330
 bpf_link_release+0x6b/0x80
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9cbf18eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd155be718 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f9cbf3d7da0 RCX: 00007f9cbf18eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f9cbf3d7da0 R08: 0000000000014520 R09: 0000001e155bea0f
R10: 00007f9cbf3d7cb0 R11: 0000000000000246 R12: 000000000004dd4e
R13: 00007ffd155be810 R14: ffffffffffffffff R15: 00007ffd155be830
 </TASK>
